Malicious PDF — malware analysis report

Static analysis result for SHA-256 4afdb706186651eb…

MALICIOUS

PDF

72.1 KB Created: 2020-12-19 14:18:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c736c6b0e918ce70b380f60a82bf3173 SHA-1: d9d5ba910ac2a397905a46c086ed6290acaab9d2 SHA-256: 4afdb706186651eb4b68e20e3c284b72a7575d210d67d25df1b6e802e8bf6718
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. Additionally, ML classification and ClamAV detection strongly indicate malicious intent. The embedded URL is likely part of a phishing or malware distribution scheme, aiming to lure users to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ggtraff.ru/strik?utm_term=manual+drake+tr7 In PDF document text
    • https://zabodoxukuxubar.weebly.com/uploads/1/3/4/9/134904472/2657663.pdfIn PDF document text
    • https://worijuxadije.weebly.com/uploads/1/3/4/8/134863955/warud-xatinafovaderi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc07dde27a199023ab34438/t/5fc1cf09f3de5e49b5a72320/1606536969757/jibugetomipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25f5a62d-fc75-47fb-ab85-86ec59f227ea/vikemulon.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/mills_sociological_imagination.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc532aedf132613bbd9a2a5/t/5fcb71c39cf56e0e8b117584/1607168451996/water_steam_table_online.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1af1ca13a450babf9a140/t/5fc35e70cb3e0f5771bb5331/1606639216576/pifufulelevapusuvev.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc552cfab79f442f246e6cc/t/5fd6c453154d727871fb0157/1607910484406/background_image_full_screen_android.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29dd524b06a7eb30a4ada/t/5fce2560920f47545bbc48a4/1607345505644/xeronobitodena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f21ab17a-d5d5-4966-a81e-9cb9319572c0/kivilinedoxes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92762df0-b2e5-4fae-a3dc-9008136ac030/sowoxotigulotomitekom.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc174bcc89e1c4b8fc25c90/t/5fcd54ad2bc7884852c50b5d/1607292078154/prison_break_season_6_cast_members.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCB 4792 bytes
SHA-256: 1b315fce6ec1f2e6accf12d08f8d4aa474cd74c36fb5be6edcf148cc8ee454dc
font_01_sfnt_off0000f039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF039 10484 bytes
SHA-256: ca2bbdd9fa411fb02ac29ac5a6eabe762e87f6571030fae36ac1f65d21ab2492

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